Classification of Howarth 1985

Or. †Ammonoidea Zittel 1884 [ammonite]
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Fm. †Placenticeratidae Hyatt 1900
G. †Kamerunoceras Reyment 1954
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Kamerunoceras eschii Solger 1904
Kamerunoceras puebloense Cobban and Scott 1972
G. †Pachydesmoceras Spath 1922
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Pachydesmoceras denisonianum Stoliczka 1865
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Invalid names: Placenticeras merenskyi Haughton 1930 [synonym]
G. †Sharpeiceras Hyatt 1903
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Sharpeiceras florencae Spath 1925
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Invalid names: Sharpeiceras goliath Haas 1942 [synonym], Sharpeiceras occidentale Benavides-Caceres 1956 [synonym]
Subg. †Phylloceras (Hypophylloceras) Salfeld 1924
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Fm. †Acanthoceratidae Grossouvre 1894
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G. †Pseudaspidoceras Hyatt 1903
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Pseudaspidoceras footeanum Stolickzka 1864
Fm. †Vascoceratidae Douvillé 1912
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G. †Vascoceras Choffat 1898
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Subg. †Vascoceras (Paravascoceras) Furon 1935
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Fm. †Turrilitidae Gill 1871
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G. †Ostlingoceras Hyatt 1900
G. †Forbesiceras Kossmat 1897
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Forbesiceras obtectum Sharpe 1853
Subg. †Calycoceras (Calycoceras) Hyatt 1900
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Subg. †Turrilites (Turrilites) Lamarck 1801
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Subg. †Mariella (Mariella) Nowak 1916
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Mariella (Mariella) oehlerti Pervinquiere 1910
Subg. †Euomphaloceras (Kanabiceras) Reeside and Weymouth 1931
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Subg. †Ostlingoceras (Ostlingoceras) Hyatt 1900
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